Rack



FIG. 1 shows a perspective view of a design for a rack.

FIG. 2 shows a front view.

FIG. 3 shows a back view.

FIG. 4 shows a right side view.

FIG. 5 shows a left side view.

FIG. 6 shows a top view.

FIG. 7 shows a bottom view.

FIG. 8 shows a perspective view in use with containers.

The broken lines shown in the figures represent portions of the rack, and environmental containers, which form no part of the claimed design. 

CLAIM The ornamental design for a rack as shown and described. 